The bigger pump is $209. That will show a HUGE improvement.
With e85 you can technically run a hotter IAT and still be safe. IDK what Lito does for that. Does he raise the IAT threshold for timing? If you do the math on e85 and how much heat it pulls out and still remain very, very safe I calculated (with help) you can run a IAT of 185deg before you need to pull timing. Check out this thread:
http://www.modularfords.com/threads/194918-What-Is-The-In-Cylinder-IAT-Drop-With-e85
Here is the pump:
http://www.ebay.com/itm/301868988494?ssPageName=STRK:MESINDXX:IT&_trksid=p3984.m1436.l2649
Thanks for the info, prob do both the larger pump and the e85 eventually.